Contents / General Description / Carter WGD 2

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6B-12 1955 PONTIAC SHOP MANUAL PUMP JET CLUSTER BODY TO FLANGE ATTACHING SCREWS VACUMETER SPRING METERING ROD JETS EXHAUST GAS PASSAGE THROTTLE SHAFT ARM BODY TO FLANGE SCREWS SCREW Fig. 6B-21 Carburetor Bowl Assembly-Carter Fig. 6B-22 Throttle Flange Assembly-Carter DISASSEMBLY OF THROTTLE FLANGE 1. Remove four throttle flange attaching screws to separate the carburetor body from flange, and remove gasket (fig. 6B-22). 2. Remove idle mixture adjusting screws and springs. NOTE: Under normal service the carburetor flange may be cleaned without further disassembly. If complete disassembly is necessary, perform the remaining operations. 3. Remove throttle shaft arm attaching screw, washer and throttle shaft arm (Fig. 6B-22). 4. File off staked ends of throttle valve attaching screws and remove screws and throttle valves. 5. Remove shaft from throttle flange. CLEANING AND INSPECTION OF PARTS Dirt, gum, water or carbon contamination in or on the exterior moving parts of a carburetor are often responsible for unsatisfactory performance. For this reason, efficient carburetion depends upon careful cleaning and inspection while servicing. 1. Thoroughly clean carburetor castings and all metal parts in clean cleaning solvent. CAUTION: Composition and plastic parts such as thermostatic coil housing and pump plunger should not be immersed in solvent. DO NOT SOAK AIR HORN ASSEMBLY IN CLEANER OR SOLVENT FOR MORE THAN ONE HALF HOUR IF CHOKE PISTON HOUSING HAS NOT BEEN REMOVED. 2. Blowout all passages in castings with compressed air and blow off all parts so they are free of solvent. CAUTION: Do not use drills or wire to clean out jets or parts as this may enlarge the opening and affect carburetor operation. 3. Carefully inspect parts for wear and replace those which are worn. Check the following specific points: a. Carefully note the condition of slots in the choke piston cylinder. If they are found to be carbonized, remove Welch plug in the bottom of the climatic control housing by piercing center with a small pointed instrument and prying outward. Care should be exercised so that damage will not result to the casting when removing this plug. Before installing new plug, carbon present in piston cylinder slots should be removed and the Welch plug seat should be carefully cleaned. b. Remove carbon from bores of flange with sandpaper; never use emery cloth. c. Remove carbon from hot air passage in base of flange (Fig. 6B-22) and from mating holes in intake manifold. d. See if needle or seat is worn; if so, both must be replaced. www.PontiacSafari.com
ENGINE FUEL-CARTER TWO BARREL 68-13 e. Check float pin for excessive wear. f. Check float for dents and excessive wear on lip. Check for fluid inside float by shaking. Replace float if any of above are present. g. Check bowl cover for wear in countershaft hole (hole worn egg shaped). h. Check throttle shaft for excessive wear (looseness or rattle in body flange casting). i. Check idle mixture adjusting screws for burrs. Replace if burred. j. Inspect metering rods and jets for bent rods and signs of wear, and replace if bent rods or wear are noted. Always replace both metering rod and jet; do not install new rod in old jet or vice versa. k. Inspect pump plunger assembly. If leather is not in good condition, replace plunger. Check operation of pump intake valve in pump plunger. 4. Check part numbers of jets, metering rod, etc. (where stamped with Carter part number), against Master Parts Catalog to make sure correct .parts will be installed. ASSEM8l Y AND ADJUSTMENT ASSEMBLY OF THROTTLE FLANGE Fig. 68-24 Throttle Shaft Installed-Carter 1. Install throttle shaft and lever assembly in flange. 2. Install throttle valves with trademark (c in circle) toward idle ports when viewing flange from manifold side (Fig. 6B-23). 3. Hold valve firmly in place with fingers and tap lightly with screwdriver to center valves before tightening screws. Always use new screws. 4. Install throttle shaft arm, washer and attaching screw in position shown in Fig. 6B-24. Throttle valves should be fully closed while tightening screw. 5. Install idle mixture adjustment screws and spring. CAUTION: To avoid possible damage to idle mixture screws, do not tighten more than finger tight. Temporary idle adjustment should be made by turning idle mixture screws until they are finger tight and then backing out 1-1 Yz turns. 6. Assemble body casting to flange using new gasket. Tighten screws evenly and securely (Fig. 6B-22). CAUTION: If two lower screws are not tightened securely poor engine idle will result. Fig. 68-23 Correct Installation of Throttle Valves-Carter ASSEMBLY OF CARBURETOR BODY 1. Install pump discharge needle (point downward), (Fig. 6B-2S) pump jet cluster gasket and pump jet cluster and screw. Always use new gasket. 2. Blowout passages in body with compressed air. 3. Install vacuum piston spring into vacumeter cylinder. 4. Install metering rod jets. (No gaskets are used.) NOTE: No pump intake strainer screen is used. www.PontiacSafari.com
Page 1 and 2: ENGINE FUEL 6B-l ENGINE FUEL CONTEN
Page 3 and 4: ENGINE FUEL-CARTER TWO BARREL 6B-3
Page 7 and 8: I I I I ENGINE FUEL-CARTER TWO BARR
Page 11: ENGINE FUEL-CARTER TWO BARREL 6B-ll

Contents / General Description / Carter WGD 2

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